HITCHCOCK AND CHASE TROPICAL NORTH AMERICAN PANICUM. 465 



TRUE PANICTJM. 



GEMINATA. 



Nodes bearded 7. P. barbinode. 



Nodes glabrous. 



Spikelets 3 mm. long; glumes and sterile lemma papery 6. P. paludivagum. 



Spikelets not over 2.4 mm. long; glumes and sterile lemma 



not papery 5. P. geminatum. 



5. Panicum. geminatum Forsk. 



Panicum geminatum Forsk. Fl. Aegypt. Arab. 18. 1775; Contr. U. S. Nat. Herb. 

 15: 30. 1910. 



This species is described by Presl ^ under the name Panicum brizoides L. (as well 

 as under P. brizaeforme Presl). The Haenke specimen from Mexico is in the herb- 

 arium of the National Museum at Prague. 



DISTRIBUTION. 



Moist ground, ditches and swamps, mostly near the coast, tropical regions of both 

 hemispheres, in America extending north into southern Florida and Texas. Origi- 

 nally described from Rosetta, Egypt. 



Lower California: El Taste, Brandegee in 1893. San Jos6 del Cabo, Brandegee 

 14, 36. 



Sonora: Yaqui River, Palmer 15 in 1869. Guaymas, Palmar 690 in 1887. Sierra 

 de Alamos, Rose, Standley dc Russell 12996. 



Sinaloa: Mazatlan, Rose, Standley & Russell 14109. 



Tamaulipas: Tampico, Hitchcock 5796, Palmer 259 in 1910. 



Colima: Manzanillo, Hitchcock 7 0S2. 



Veracruz: Veracruz, Hitchcock 6586. 



Guerrero: Acapulco, Palmer 289 in 1894. 



Yucatan: Izamal, Gaitmer 1027. 



Guatemala: San Jose, Kellerman 

 6250. 



Salvador: Lake Ilopango, Hitch- 

 cock 8920. 



Costa Rica: Bebedero, Jimenez 

 734. 



Panama: Corozal, Pittier 2168, 

 2170. Pedro Miguel, Hitch- 

 cock 7956, Pittier 2509. Em- 

 pire, Pittier 3714. Gatun, 

 Hitchcock 7980. 



Bahamas: Nassau, Curtiss 175. Fortune Island, Eggers 3992 (K. U. Herb.). 



Cuba: Habana, jCedn769, 918. Corrientes Bay, 5nito?i cfc CoweZ^ 9931. Santiago 

 de las Vegas, Hitchcock 143. Guanabacoa, Leon 920. Guantanamo, Britton 

 2281. Sancti Spiritus, Sergius 2789. Batabano, Hitchcock 142. Handbana, 

 Wright 761. Palma Sola, Wright in 1860. 



Jamaica: Gordon Town, Hart 806. Ferry River, Harris 11352. Appleton, 

 Hitchcock 9653. Palisadoes near Kingston, Hitchcock 9752. Black River, 

 Hitchcock 9579. Savanna-la-Mar, Hitchcock 9877. 



Fig. 15. — Distribution of P. geminatum. 



' Presl, Rel. Haenk. 1: 302. 1830. 



82472°— 15- 



